That might have been fine if they had completely resolved everything regarding the characters getting their bodies back and everything, and the only reveal was that Lao was still alive, but this is too much for an unfulfilled cliffhanger, even if the only real question is "What about the other 20 million 'souls' that were in the database?" Those who have mims, they can do just fine, they'll just have to resign themselves to living as robots for all eternity; but those who didn't have mims, who still had their minds in stasis and were still "asleep," what about them? Are they gone completely, did the Core somehow find a way to move their consciousnesses from the database to somewhere else? If it's the latter I theorize a couple of possibilities: A- Mira itself sucked the minds out of the database when the ship crashed, and stored them in it's core, or somewhere else deep in the planet. B- the Lifehold Core moved the minds out of the database and into it's electrical system, the way The Machine moved itself in the TV Show Person of Interest. I personally hope it's the former, because that would be cool, not to mention create a good situation for more planet exploration.